解析省市区（oc）

#import 
int main(int argc, const char * argv[]) {
    
    NSMutableArray *provinceArray = [NSMutableArray array];
    //NSError *error =nil;
    // 加载文件字符串  1.文件路径 2.编码格式3.错误信息
    NSString *contentString = [NSString stringWithContentsOfFile:@"/Users/lanou3g/Desktop/area.txt" encoding:NSUTF8StringEncoding error:nil];
    //NSLog(@"%@",contentString);
    //以换行符分割字符串 得到每一行的字符串内容
    NSArray *lineArray = [contentString componentsSeparatedByString:@"\n"];
    for (NSString *lineString in lineArray) {
        //NSLog(@"line:%@",lineString);
        if (![lineString hasPrefix:@" "]) {
            // 没有空格前缀为省名
            //创建一个省份字典
            NSMutableDictionary *provincrDic = [NSMutableDictionary dictionary];
            // 省份字典添加键值对（provinceName省份名）
            [provincrDic setObject:lineString forKey:@"provinceName"];
            //创建一个城市数组（后面存储城市字典）
            NSMutableArray *cityArray = [NSMutableArray array];
            //添加键值对（cityArray：城市数组）
            [provincrDic setObject:cityArray forKey:@"cityArray"];
            //将省字典添加到省数组中
            [provinceArray addObject:provincrDic];
      
        }else if (![lineString hasPrefix:@"    "]){
            //前缀不空格且不是4个空格的话为城市名
            //当读取到城市名的时候需要找到该城市所属的省份（省份数组中最后一个元素就是当前城市所属省份）
          NSMutableDictionary *provinceDic =[provinceArray lastObject];
        NSMutableArray *cityArray = [provinceDic objectForKey:@"cityArray"];
          //创建城市字典
            NSMutableDictionary *cityDic = [NSMutableDictionary dictionary];
            //添加键值对（cityName城市名）
            [cityDic setObject:lineString forKey:@"cityName"];
            //创建地区数组（后面用于存储地区名称）
            NSMutableArray *areaArray = [NSMutableArray array];
            //添加键值对（areaArray：地区数组）
            [cityDic setObject:areaArray forKey:@"areaArray"];
            //将城市字典存入对应的城市数组中
            [cityArray addObject:cityDic];
    
        }else{
            //前缀有空格且有4个空格为地区名
            //获取当前所属省份
            NSMutableDictionary *provinceDic = [provinceArray lastObject];
            //获取该省份的城市数组
            NSMutableArray *cityArray = [provinceDic objectForKey:@"cityArray"];
            //从城市数组中获取当前地区所属城市
            NSMutableDictionary *cityDic = [cityArray lastObject];
            //获取该城市的地区数组
            NSMutableArray *areaArray = [cityDic objectForKey:@"areaArray"];
            //将地区名存入该地区数组
            [areaArray addObject:lineString];
         
        }
    }
    //NSLog(@"%@",provinceArray);
    for (NSMutableDictionary *provinceDic in provinceArray) {
        NSLog(@"省份：%@",[provinceDic objectForKey:@"provinceName"]);
        for (NSMutableDictionary *cityDic in [provinceDic objectForKey:@"cityArray"]) {
            NSLog(@"城市：%@",[cityDic objectForKey:@"cityName"]);
            for (NSString *areaName in [cityDic objectForKey:@"areaArray"]) {
                NSLog(@"地区：%@",areaName);
            }
        }
    }

    return 0;
}

这是在OC中利用数组和字典的相互套用解析的，附一张思维图。

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